Owner and curator for @mrtrunk@dromedary.seedoubleyou.me and the entire suite of #privacy conscious seedoubleyou.me tools.
Check your proxy’s CORS origin statements and make sure they align with the recommended config for your brand of proxy (nginx, caddy, etc.) I had a similar issue with mine and that solved it. Consult your doctor if your proxy can’t stay running longer than four hours.
No one-stop-shop that I have seen or heard of, but check out Gluetun. https://github.com/qdm12/gluetun